Mandrel.



' jury to the web.

nnirr nn STATES risen UFFlQlt.

LEON L. SIBL'EY, orivronnonnninen, MASSACHUSETTS.

MAN DREL.

Specification of Letters Patent;

Application filed July 3, 1918. Serial No.'243,219.

To all whom it may concern:

Be it known that I, LEON L.

Monroe Bridge, in the county of Franklin and State of Massachusetts,have invented whereby the same may be readily expanded or contracted inorder to effectively engage or release the roll of paper mounted upon are-windingshaftor the like and without in- It is also anob in each ofsaid sections is adaptedto be mounted upon a shaft for rotation inunison therewith together with means coacting with the sections oftheimandrel for expanding the same.

The invention consists in the details of.

construction and in the combination and arrangement of the several partsof my improved mandrel whereby certain important advantages are attainedand the devicerem dered simpler, less fexpensiveand otherwise more.convenient and advantageous for use, a

panying drawings, wherein- Figure-1 is a View partly in elevation andpartly in section illustrating a mandrel constructed in accordance withan embodiment ofmy invention;

Fig. 2 isa sectlonal view taken substantially on the line 22 of Fig. 1;and

Fig. 3 is a sectional view taken substantially on the line 3.3 ofFig. 1. V

As disclosed in the accompanying drawings 1 denotes a mill roll shaftorthe like having its central portion angular in cross Sister, a citizenof the United States, residing at ct o flthe invention to provide anovel and improved mandrel. d1 vide'd longitudinally into sections andwhere- ,able expanding member.

section and its opposite end portions circular-an cross section, asindicated at a and b respectively. One of the portions 6 has afiixedthereto through the medium of the pins3, a sleeve 4. Surrounding thesleeve 4 and in longitudinal spaced relation are the annular members orrings 5 fixed to the sleeve it through the medium of the pins 3. Looselymounted upon the sleeve 1, between theannular members or rings 5, is aguide member 6. The periphery of the member 6 is angularin cross sectionand has its opporoll and without affecting the rotation of the shaft.

The inner end of the sleeve 1 is defined by an outstanding annularflange 8 having its outer side face or its face opposed to theintermediate portion a of the shaft 1 pro- ]Patented Mar. 4 1919.

site end portions defined by the outstanding flanges 7 By thisarrangement it will be perceived that the guide membero affords asuitable support for the shaft 1 in a mill vided; with an annular recess9. The inner wall 10 of the recess 9 is beveled or tapered towardtheportion a and the outer wall 11 has its inner face concentric to theadjacent portion 6. 7 It is to be particularly noted that theouter wall11 is of a width less than that of the wall 10. j

Freely mounted upon. the second portion 6 of the shaft 1 is a sleeve 12having its inner end portion of thesame construction as has just beenset forth relative to the sleeve l. Contacting withthefouter end of thesleeve 12 is an adjusting member or nut 14 in threaded engagement withthe shaft.

The sleeve 4 may be termed a stationary expanding member and the sleeve12 a mov- Positioned between the members or sleeves & and 12 is amandrel M split or cut longitudinally to aiford two sections 15 and eachof said sectionsr15 is substantially semi-circular in cross section. Theopposite ends of the sections 15 of the mandrel M are beveled as at 16to correspond with the beveled sidewalls 10 at the inner ends of each ofthe sleeves or members 4, and 12 with the peripheral portion of each ofsaid members 15 at its .ends recesses as at 17 to receive the outerwallll. j

Each ofthe sections 15 of the mandrel M adjacent the ends thereof areprovided with the inwardly directed lugs 18 having an openingtherethrough conforming to the 7 ate portion of the shaft and splitlongicross sectional configuration of 'the' portion a of the shaft 1 butof increased diameter so that the sections 15 mayhave lateral move:

ment relative to each other and to the shaft 1. Upon turning theadjusting member or nut 14 in proper direction, the same will be caused,to force inwardly the expanding sleeve 12, resultingin the expansionofthe mandrel M or a relative separating movement of the sections 15 sothat said mandrel M may be caused to have effective frictionalcontactwith the wall of the bore of the paper roll through which theshaft 1- and the mandrelM may be directed and which contact is effectedwithout injury to the web of the paper roll or the like.

Disposed through the portion a ofthe shaft'l at a point in closeproximity to the member or sleeve 12, is a pin 19. The pin 19serves as astop coacting with the adjacent lug 18 whereby the sections 15 havelimited movement longitudinally of the shaft 1 and a movement onlysufficient to permit the mandrel M'and the shaft l to be withdrawn froma paper roll or the like.

I also find it of advantage to fix to the shaft 1 substantially midwayof the portion Z) a collar 20 having its periphery beveled in crosssection and on the same angle as the wall 10' of each of the members orsleeves 4. and 12 and extending in the same general direction as thewall 10 of the sleeve or member 41. Secured to the inner face of each ofthe'sections 15 of the inan- 'drel M is an arcuate member or .flange 21,havinga beveled face riding lipon the bev- .trated in Fig. 1 and wherebythe danger of the central portions of the sections 15 beingbent inwardlyis avoided.

From the foregoing description, it is thought to be obvious that amandrel constructed in accordance with an embodiment of my invention isparticularly well adapted for use by reason of the convenience andfacility with which it may be assembled and operated, and it will alsobe obvious that my invention is susceptible of some change andmodifications without departing from the principles and scope thereofand for this reason" Ido not wish to be understood as limiting myself tothe precise arrangement and formation of the several parts hereinshown'in carrying out my invention in practice except as hereinafterclaimed.

I claim: L

1. Incombination with a shaft having an intermediate portion angular incross section, a mandrel surrounding the intermedi- 7 tion, a. mandrelsurrounding-the interme' diate portion of the shaft and split lo'ngi-'tudinally into separable sections, eachof sald sections being providedadjacent its i ends with an inwardly directedlugjhaving' *an openingsubstantially conforming to the cross sectional configuration ofthe-inter mediate portion of the shaft andthrough which said shaft isdirected, theope nings'in the lug being of a diameter greater than thediameter of the intermediate portion ofthe shaft, and expandingmemberscarried-by the shaft and coacting with the opposite ends of the.mandrel, one of 'said'members" being station'ar and the secondof saidmembers being movablelongitudinally of the shaft. 1 r v 1 ,7

3. In combination with a shaft having an intermediate portion angular incrOss se'ction, a mandrel 'surroundingwthe intermedi ate portion of theshaft and split longitudinally into separable sections, each ofsaictioosections being provided adjacent its ends with an inwardlydirected: lug havingxanopening substantially conforming tether-.-crosssectional configuration of the inter-.7 mediate portionof the shaftand through which said shaft is directed, the openings in the lug beingof a diameter greater than the diameter of the intermediate portionvoftheshaft, expanding members carriedby-the shaft and coacting with theoppositeends of the mandrel, one of said members being, stationary andthe second of said members being movable longitudinally of the shaft,.and a member threaded upon the shaft for imparting endwise movementtothe mov 1115: able expansion member toward the mandrel.

4. In combination with a shaft havinguan' intermediate portion angularin cross sec tion, a mandrel surrounding the interme.' diate portion oftheshaft and split longii tudinally into separable ,sections each of;said sections being provided adjacent: its ends with an inwardlydirected lug'having; an opening substantially con-formin'gto the crosssectional configuration: of ,the 1:inter- 3, mediate portion oftheshaftandfthrough which said shaft is directed, the openings in" the lugbeing of a diameter .greater than the diameter of the-intermediateportion 10f; the-shaft, andflexpanding members carriedylao:

7 ends of the mandrel, the inner ends of the members being tapered, thecoacting ends of the sections of the mandrel being correspondinglytapered so that movement of one of the expanding members toward themandrel effects a separating movement to the sections of the mandrel.

5. In combination with a shaft having an intermediate portion angular incross section, a mandrel surrounding the intermediate portion of theshaft and split longitudinally into separable sections, each of saidsections being provided adjacent its ends with an inwardly directed lughaving an opening substantially conforming to the cross sectionalconfiguration of the intermediate portion of the shaft and through whichsaid shaft is directed, the openings in the lugs being each of adiameter greater than the diameter of the intermediate portion of theshaft, expanding members carried by the shaft and coacting with theopposite end portions of the mandrel, and means carried by the shaft andcoacting with the sections of the mandrel for limiting the movement ofsaid sections in one direction longitudinally of the shaft.

6. In combination with a shaft having an intermediate portion angular incross section, a mandrel surrounding the intermediate portion of theshaft and split longitudinally into separable sections, each of saidsections being provided adjacent each of its ends with an inwardlydirected lug,

said lug being provided with an opening substantially conforming to thecross sectional configuration of the intermediate portion of the shaftand through which the shaft is directed, the opening in the lug being ofa diameter greater than the diameter of the intermediate portion of theshaft, means for imparting separating movement to the sections of themandrel, and means for limiting the movement of the sections in onedirection longitudinally of the shaft.

In testimony whereof I hereunto aifix my signature in the presence oftwo witnesses.

HARRIETTE RAPP.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

- Washington, D. 0.

